franz@localhost:~$ sudo emerge --unmerge xfce-base/xfdesktop-4.7.0
* This action can remove important packages! In order to be safer, use
* `emerge -pv --depclean <atom>` to check for reverse dependencies before
* removing packages.

Dependencies could not be completely resolved due to
* the following required packages not being installed:
....
* Have you forgotten to run `emerge --update --newuse --deep @world` prior
* to depclean?